๐ขMath & Numbers
Free online math calculators: percentages, fractions, ratios, averages, statistics, rounding and more. Fast, accurate, no sign-up.
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Percentage Calculator Free percentage calculator: find what percent of a number, percentage increase or decrease, percent change, percentage difference and reverse percentages fast. โ Absolute Value Calculator Free absolute value calculator finds |x|, the distance of any number from zero. Enter one value or a whole list to get the modulus of each, with rules and examples. ๐ Acceleration Calculator Free acceleration calculator solves a = (vf - vi) / t for acceleration, velocity, or time. See change in velocity, g-force, units, and step-by-step worked examples. ๐ข Antilog Calculator Free antilog calculator finds the antilogarithm b^x for base 10, e, 2 or any base. Reverse a logarithm instantly with worked steps, an antilog table and examples. ๐ Area Calculator Free area calculator for rectangles, squares, triangles, circles, trapezoids and parallelograms. Enter dimensions for instant area, the formula used, and full working. ๐ข Arithmetic Sequence Calculator Free arithmetic sequence calculator finds the nth term, the sum of the series, and the common difference. Enter first term, difference, and count for instant steps. ๐ Average Calculator Free average calculator finds the mean, median, mode, sum, count, min, max and range of any list of numbers instantly. Handles decimals, negatives and ties. ๐ Average Percentage Calculator Free average percentage calculator. Find the simple mean of percentages, or weight each by sample size for the true overall percentage. Formula and examples. ๐ Average Rate of Change Calculator Free average rate of change calculator. Enter a, f(a), b, and f(b) to get the average rate of change with steps, the secant line slope, and units, instantly. ๐งฎ Basic Calculator Free online basic calculator: add, subtract, multiply and divide with percent, decimal and sign keys. Type or tap, keyboard support, no sign-up. Fast and private. ๐ข Binary Calculator Free binary calculator to add, subtract, multiply and divide base-2 numbers. Get instant binary and decimal results, plus place-value and two's complement guides. โญ Circle Calculator Free circle calculator: enter any one of radius, diameter, circumference, or area and instantly get the other three. Uses ฯrยฒ and 2ฯr, with worked examples. โช Circumference Calculator Free circumference calculator: enter a radius or diameter to instantly get the circumference (2ฯr) and area (ฯrยฒ). Includes formulas, worked examples, and a reference table. ๐ Coefficient of Variation Calculator Free coefficient of variation calculator. Paste your data to get the mean, sample and population standard deviation, and the CV (relative standard deviation) %. ๐ข Collatz Conjecture Calculator Free Collatz conjecture calculator. Enter any positive integer to generate the 3n+1 sequence, the number of steps to reach 1, and the highest value reached. ๐ข Combinations with Repetition Calculator Free combinations with repetition calculator. Find the multiset coefficient C(n+r-1, r) using the stars and bars method, and compare it to the standard nCr. ๐งฎ Complex Number Calculator Free complex number calculator: add, subtract, multiply or divide two complex numbers (a+bi) and get the result plus its modulus and argument instantly. ๐ Confidence Interval Calculator Free confidence interval calculator for a mean. Enter sample mean, standard deviation, size and 90, 95 or 99% to get the margin of error and bounds instantly. โ๏ธ Cross Multiplication Calculator Free cross multiplication calculator. Solve a/b = c/x proportions by cross multiplying: leave one box blank and get the missing value with clear steps shown. ๐งฎ Cubic Equation Solver Free cubic equation solver: enter a, b, c and d to solve axยณ + bxยฒ + cx + d = 0 and get up to three real or complex roots instantly, with the steps explained. โ Decimal to Fraction Converter Free decimal to fraction converter. Convert any decimal into a fraction in lowest terms, see the mixed number form, and reverse it back to a decimal instantly. ๐ข Digit Sum Calculator Free digit sum calculator: add up the digits of any number, find the digital root, and count the digits. Handles negatives and very large integers instantly. ๐ข Discriminant Calculator Free discriminant calculator. Enter a, b and c to compute the quadratic discriminant b squared minus 4ac and instantly see the number and nature of the roots. ๐ Distance Calculator Free distance formula calculator. Enter two points (x1, y1) and (x2, y2) to find the straight-line distance and the midpoint, with every step shown clearly. ๐ข Exponent Calculator Free exponent calculator: enter a base and an exponent (negative and decimal values allowed) to get base raised to the power instantly, with expanded form. ๐ Exponential Growth Calculator Free exponential growth and decay calculator. Enter an initial value, growth rate percent and number of periods to get the final amount and total change. โ Factorial Calculator Free factorial calculator. Enter a non-negative integer n to get n! computed exactly with BigInt, plus the expansion for small n. Runs in your browser. ๐ Fibonacci Calculator Free Fibonacci calculator: enter n to list the first n Fibonacci numbers and find the nth term. Uses BigInt for exact results on large n. No rounding errors. โ Fraction Calculator Free fraction calculator to add, subtract, multiply, and divide fractions and mixed numbers. See the simplified fraction, mixed number, decimal, and the steps. ๐ข Fraction to Percent Calculator Free fraction to percent calculator: convert any fraction to a percentage and decimal, or turn a percent back into a fraction in lowest terms, with steps. ๐ข GCF and LCM Calculator Free GCF and LCM calculator: enter any list of whole numbers to find the greatest common factor and least common multiple instantly, with the method shown. ๐ Geometric Mean Calculator Free geometric mean calculator: enter positive numbers to get the geometric mean (the nth root of their product) plus the arithmetic mean for comparison. ๐ข Geometric Sequence Calculator Free geometric sequence calculator: enter first term, common ratio, and term count to get the nth term, sum of n terms, the full term list, and infinite sum. ๐ Golden Ratio Calculator Free golden ratio calculator: enter one part and get the longer part, shorter part, and total split by phi (1.618) instantly for design and layout work. ๐งช Half Life Calculator Free half life calculator using N = N0 * 0.5^(t/T). Solve for the remaining amount, elapsed time, or half-life, and see half-lives elapsed and percent left. ๐ต Harmonic Mean Calculator Free harmonic mean calculator: enter positive numbers to get the harmonic mean instantly, plus the arithmetic and geometric means shown for easy comparison. ๐ Triangle Area (Heron) Calculator Free Heron's formula calculator: find a triangle's area from its three sides (SSS). Enter sides a, b and c to get the area, perimeter and the full working. ๐ Interquartile Range Calculator Free interquartile range (IQR) calculator. Enter your data set to find Q1, Q2 (median), Q3 and the IQR, and flag any outliers using the 1.5 x IQR rule. โก Kinetic Energy Calculator Free kinetic energy calculator. Use KE = 1/2 m v squared to solve for kinetic energy, mass, or velocity in joules, kilograms, and meters per second instantly. ๐งฎ Logarithm Calculator Free log calculator. Find the logarithm of a number to any base, plus the natural log (ln) and base-2 log instantly. Enter a number and base to start. โ Long Division Calculator Free long division calculator: enter a dividend and divisor to get the quotient, remainder and exact decimal result, plus the full step-by-step working below. ๐ Margin of Error Calculator Free margin of error calculator for surveys and polls. Enter your sample size, confidence level, and proportion to get the MOE percent and confidence interval. ๐ข Matrix Calculator Free 2x2 matrix calculator. Find the determinant (ad - bc), the inverse, or multiply two 2x2 matrices, with clear step-by-step working for every result. ๐ Mean Absolute Deviation Calculator Free mean absolute deviation calculator. Enter a list of numbers to get the mean, each absolute deviation, and the MAD with full step-by-step working shown. ๐งฎ Mean, Median, Mode Calculator Free mean median mode calculator. Paste a list of numbers to instantly get the mean, median, mode, range, sum, count, minimum, and maximum with the sorted list. ๐งฎ Median Calculator Free median calculator: paste numbers separated by commas, spaces, or new lines to get the median, count, min, max, and the full sorted list instantly. ๐ Midpoint Calculator Free midpoint calculator: enter two points (x1,y1) and (x2,y2) to find the midpoint and the distance between them, with the midpoint formula and clear steps. ๐ Midrange Calculator Free midrange calculator: enter a list of numbers to get the midrange, the midpoint of the highest and lowest values, plus the min, max, range and mean. ๐ข Mixed Number Calculator Free mixed number calculator: convert a mixed number to an improper fraction and decimal, or turn an improper fraction back into a mixed number in lowest terms. โ Modulo Calculator Free modulo calculator: enter a dividend and divisor to find the remainder, quotient, and the always-positive modulo, with clear handling of negative numbers. ๐งช Molarity Calculator Free molarity calculator: solve for molarity, moles, or volume, or find concentration from mass and molar mass. Works in mL or L and shows every step. โ๏ธ Molecular Weight Calculator Free molecular weight calculator: type a chemical formula like C6H12O6 or Ca(OH)2 and get the molar mass in g/mol plus a per-element breakdown and mass percent. โ๏ธ Multiplication Table Generator Free multiplication table generator: make a times table for any number or a full grid. Clean, printable layout for study, homework and classroom practice. โ Nth Root Calculator Free nth root calculator: enter a number and a root degree to find the cube root, fourth root, or any nth root, with clear step-by-step working shown. ๐ข Number Sorter Free number sorter: paste a list of numbers and sort them ascending or descending numerically. Get the min, max, count and sum, remove duplicates, and copy. ๐ข Number to Words Converter Free number to words converter. Spell any number in English, write decimals and cheque amounts in dollars and cents, or get ordinals, instantly in your browser. ๐ฒ Odds Calculator Free odds calculator: convert odds to probability and probability to odds both ways. See implied probability percent and decimal odds from any ratio instantly. ๐บ Pascal Triangle Generator Free Pascal triangle generator: build the first N rows online, see each entry as a binomial coefficient C(n, k), and copy the triangle as text or CSV. ๐ Percent Difference Calculator Free percent difference calculator. Enter two values to get the percentage difference relative to their average, plus the absolute difference and the mean. ๐ฏ Percent Error Calculator Free percent error calculator: enter your measured and actual values to get the percent error and absolute error instantly, with formula and worked examples. % Percent to Decimal Converter Convert percent to decimal and decimal to percent instantly with this free two-way calculator. See the simple rule: divide by 100 or move the point two places. ๐ Percentage Change Calculator Free percentage change calculator. Enter an old and new value to see the percent increase or decrease, the direction, and the raw difference instantly. ๐ Percentage Increase Calculator Free percentage increase calculator. Find the percent change between two values, or increase a number by a percent. See the exact difference and result instantly. ๐ฅง Percentage of Total Calculator Free percentage of total calculator: find what percent a part is of a total, or list each value as a percent of the sum, with the sum shown instantly. ๐ Percentile Calculator Free percentile calculator: find the value at any percentile of your data using linear interpolation, or get the percentile rank of a number. Shows sorted data. โ Perfect Square Checker Free perfect square checker: enter a whole number to see if it is a perfect square, get its exact square root, the nearest perfect squares, and a cube check. ๐ Perimeter Calculator Free perimeter calculator for a rectangle, square, triangle, circle and regular polygon. Enter the dimensions to get the perimeter or circumference instantly. ๐ข Permutation and Combination Calculator Free permutation and combination calculator. Enter n and r to find nPr and nCr instantly, with exact whole-number results, worked examples, and formulas. ๐ฅง Digits of Pi See the digits of pi to any number of decimal places, up to 1000. Pick how many places you want, read the exact value of pi, and copy the full pi digits list. ๐งฎ Prime Factorization Calculator Free prime factorization calculator: enter an integer and get its prime factors in power form like 60 = 2^2 x 3 x 5, plus a full list of all divisors instantly. ๐ข Prime Number Checker Free prime number checker. Enter any whole number to instantly test if it is prime, see its factors and prime factorization, and list all primes up to a limit. ๐ฒ Probability Calculator Free probability calculator: find the chance of a single event, plus P(A and B) and P(A or B) for two independent events from probabilities or percents. โ๏ธ Proportion Calculator Free proportion calculator: solve A/B = C/D for any missing value. Enter three numbers, leave one blank, and see the cross-multiplication steps to find x. ๐ Pythagorean Theorem Calculator Free Pythagorean theorem calculator: enter any two sides of a right triangle and get the missing side, the area, and clear step-by-step working instantly. ๐ฅ Quadratic Formula Calculator Free quadratic formula calculator: enter a, b and c to solve ax2 + bx + c = 0. Get real or complex roots, the discriminant, vertex and axis of symmetry instantly. ๐งฎ Quadratic Formula Solver Free quadratic formula solver. Enter a, b and c to solve axยฒ + bx + c = 0. See the discriminant, real or complex roots, and the worked steps instantly. โ Ratio Calculator Free ratio calculator: simplify any ratio A:B to its lowest terms, or solve a proportion A:B = C:D for the missing value. Instant, step-by-step results. ๐ Reciprocal Calculator Free reciprocal calculator: find the multiplicative inverse of any number or fraction. Enter a value to get 1 over x as a decimal and a reduced fraction. โ RMS Calculator Free RMS calculator: enter numbers to get the root mean square (quadratic mean) plus the arithmetic mean for comparison, with clear step-by-step working. ๐ข Rounding Calculator Free rounding calculator: round any number to the nearest whole, to N decimal places, to the nearest 10, 100 or 1000, or round up or down. See the rule applied. ๐งฎ Scientific Calculator Free online scientific calculator with sin, cos, tan, log, ln, powers, roots, factorial, pi and e. Build expressions with parentheses and get instant results. ๐ฌ Scientific Notation Calculator Free scientific notation calculator: convert any number to and from scientific notation, E-notation, engineering notation and standard decimal form with chosen precision. ๐ฌ Scientific Notation Converter Free scientific notation converter. Turn any decimal into scientific notation, E notation and engineering notation, or expand notation back to standard form. ๐ข Significant Figures Calculator Free significant figures calculator: count the sig figs in any number, see which digits count, and round to a chosen number of significant figures fast. ๐งฎ Simultaneous Equation Solver Free simultaneous equation solver for two-variable linear systems. Enter six coefficients to solve a1x+b1y=c1 and a2x+b2y=c2 by Cramer rule with full steps. ๐ Slope Calculator Free slope calculator. Enter two points to find the slope (gradient), the line equation y = mx + b, the distance between the points, and the angle of incline. ๐ Slope Intercept Calculator Free slope intercept form calculator. Enter two points to get slope m, y-intercept b, and the line equation y = mx + b, with full step-by-step working. โ Square Root Calculator Free square root calculator: type any number to get its square root (sqrt) and cube root instantly. Handles decimals and negatives, with worked examples. ๐ Standard Deviation Calculator Free standard deviation calculator. Paste your numbers to get the mean, variance, sum of squares, and both sample (n-1) and population (n) standard deviation with steps. ๐ Standard Error Calculator Free standard error calculator: paste your raw data to get the standard error of the mean, or enter s and n directly. Returns SE, sample size, and standard deviation. โ Sum Calculator Free sum calculator: paste a list of numbers and instantly get the total, count, average, minimum, maximum and product. Handles decimals and negatives. ฮฃ Sum of Squares Calculator Free sum of squares calculator. Paste a list of numbers to get the algebraic sum of squares, the total sum of squared deviations from the mean, plus the count. ๐ฆ Surface Area Calculator Free surface area calculator for a cube, box, sphere, cylinder and cone. Enter the dimensions for the total surface area instantly, plus the formula used. ๐ Right Triangle Calculator Free right triangle calculator. Enter any two sides (legs a, b or hypotenuse c) to find the third with the Pythagorean theorem, plus area and both angles. ๐ Trigonometry Calculator Free trigonometry calculator: enter an angle in degrees or radians to get sin, cos, tan, csc, sec and cot, or use inverse mode to find the angle from a ratio. ๐ Variance Calculator Free variance calculator. Paste your numbers to get the mean, sum of squares, and both sample and population variance plus the standard deviation, with steps shown. ๐ Velocity Calculator Free velocity calculator. Solve average velocity (v = d / t) or final velocity (v = u + a x t) for any unknown, with clear SI units and step by step working. ๐ฆ Volume Calculator Free volume calculator for 3D shapes. Find the volume of a cube, box, sphere, cylinder, cone, or pyramid by entering the dimensions. See the exact formula used. โ๏ธ Weighted Average Calculator Free weighted average calculator: enter values and weights to get the weighted mean instantly. Compares against the simple average and shows your total weight. ๐ Z-Score Calculator Free z-score calculator: enter a raw value, mean and standard deviation to find the standard score and see how many standard deviations it is from the mean.
Math turns up in everyday life far more than most of us expect: splitting a bill, working out a discount, checking a grade, or making sense of a statistic in the news. Our math calculators do the arithmetic for you and, just as importantly, show the working so you can follow the method.
Every tool here runs instantly in your browser, needs no sign-up, and keeps your numbers on your own device.